He is accualy a genius. But have a crayon stuck in his brain. One episode he removes it, but none of his friends like him anymore becouse he is too much of a brainer. So he decides on beeinga jerk and show that crayon back in. Mostly to Lisa's dissapointment. Since she is the one missing his true self most of all. (Becouse for once she was able to connect with her father on her terms and intellectual level) So disregard intelligence. Manintain friendships.